Novo Air, Biman Bangladesh Airlines and US-Bangla fly from Sylhet to Chittagong 4 times a day. Alternatively, BusBD operates a bus from Sylhet to Chittagong once daily. Tickets cost $12 and the journey takes 9 h 30 min.
From Sylhet taxi to Sylhet airport, fly to Chittagong airport, then taxi to Chittagong. 3 h 3 min $180. From Sylhet bus to Chittagong. 9 h 30 min $12. From Sylhet taxi to Chittagong. 5 h 28 min $127. From Sylhet drive to Chittagong. 5 h 28 min.